Performance of polarization-sensitive neurons of the locust central complex at different degrees of polarization.
Central complex
Desert locust
Intracellular recordings
Polarization vision
Sky compass coding
Journal
Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology
ISSN: 1432-1351
Titre abrégé: J Comp Physiol A Neuroethol Sens Neural Behav Physiol
Pays: Germany
ID NLM: 101141792
Informations de publication
Date de publication:
05 2022
05 2022
Historique:
received:
08
09
2021
accepted:
25
01
2022
revised:
18
01
2022
pubmed:
15
2
2022
medline:
25
5
2022
entrez:
14
2
2022
Statut:
ppublish
Résumé
The polarization pattern of the sky is exploited by many insects for spatial orientation and navigation. It derives from Rayleigh scattering in the atmosphere and depends directly on the position of the sun. In the insect brain, the central complex (CX) houses neurons tuned to the angle of polarization (AoP), that together constitute an internal compass for celestial navigation. Polarized light is not only characterized by the AoP, but also by the degree of polarization (DoP), which can be highly variable, depending on sky conditions. Under a clear sky, the DoP of polarized sky light may reach up to 0.75 but is usually much lower especially when light is scattered by clouds or haze. To investigate how the polarization-processing network of the CX copes with low DoPs, we recorded intracellularly from neurons of the locust CX at different stages of processing, while stimulating with light of different DoPs. Significant responses to polarized light occurred down to DoPs of 0.05 indicating reliable coding of the AoP even at unfavorable sky conditions. Moreover, we found that the activity of neurons at the CX input stage may be strongly influenced by nearly unpolarized light, while the activity of downstream neurons appears less affected.
Identifiants
pubmed: 35157117
doi: 10.1007/s00359-022-01545-2
pii: 10.1007/s00359-022-01545-2
pmc: PMC9123078
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
387-403Subventions
Organisme : Deutsche Forschungsgemeinschaft
ID : HO 950/24-1
Organisme : Deutsche Forschungsgemeinschaft
ID : HO 950/28-1
Informations de copyright
© 2022. The Author(s).
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